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fix: rp - disable Pull-down/up resistors for ADC read

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Signed-off-by: Lachezar Lechev <elpiel93@gmail.com>
This commit is contained in:
Lachezar Lechev 2023-02-28 09:22:38 +02:00
parent 28b695e7c9
commit 5cb0c8cc01
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GPG Key ID: B2D641D6A2C8E742
1 changed files with 10 additions and 1 deletions
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11
embassy-rp/src/adc.rs
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@ -7,6 +7,7 @@ use embassy_hal_common::into_ref;
use embassy_sync::waitqueue::AtomicWaker; use embassy_sync::waitqueue::AtomicWaker;
use embedded_hal_02::adc::{Channel, OneShot}; use embedded_hal_02::adc::{Channel, OneShot};
use crate::gpio::Pin;
use crate::interrupt::{self, InterruptExt}; use crate::interrupt::{self, InterruptExt};
use crate::peripherals::ADC; use crate::peripherals::ADC;
use crate::{pac, peripherals, Peripheral}; use crate::{pac, peripherals, Peripheral};
@ -90,9 +91,17 @@ impl<'d> Adc<'d> {
} }
} }
pub async fn read<PIN: Channel<Adc<'d>, ID = u8>>(&mut self, _pin: &mut PIN) -> u16 { pub async fn read<PIN: Channel<Adc<'d>, ID = u8> + Pin>(&mut self, pin: &mut PIN) -> u16 {
let r = Self::regs(); let r = Self::regs();
unsafe { unsafe {
// disable pull-down and pull-up resistors
// pull-down resistors are enabled by default
pin.pad_ctrl().modify(|w| {
w.set_ie(true);
let (pu, pd) = (false, false);
w.set_pue(pu);
w.set_pde(pd);
});
r.cs().modify(|w| { r.cs().modify(|w| {
w.set_ainsel(PIN::channel()); w.set_ainsel(PIN::channel());
w.set_start_once(true) w.set_start_once(true)